title: Field re-entrant hidden-order phase under pressure in URu2Si2.
abstract: We succeeded in growing high quality single crystals of URu(2)Si(2) and performed thermal expansion measurements under pressure. Applying a magnetic field along the [001] direction in the tetragonal structure, the so-called hidden-order phase reappears after the suppression of the antiferromagnetic phase above the critical pressure P(x). We determined the pressure-temperature-field phase diagram for the paramagnetic, hidden-order and antiferromagnetic states for the [Formula: see text] direction. We also present the temperature dependence of the upper critical field H(c2) for [Formula: see text] and [100] determined by the AC specific heat measurements, corresponding to the bulk superconductivity in a high quality single crystal.
authors.affiliation: INAC/SPSMS, CEA-Grenoble, 17 rue des Martyrs, F-38054 Grenoble, France. dai.aoki@cea.fr
authors.forename: D
authors.initials: D
authors.lastname: Aoki
authors.forename: F
authors.initials: F
authors.lastname: Bourdarot
authors.forename: E
authors.initials: E
authors.lastname: Hassinger
authors.forename: G
authors.initials: G
authors.lastname: Knebel
authors.forename: A
authors.initials: A
authors.lastname: Miyake
authors.forename: S
authors.initials: S
authors.lastname: Raymond
authors.forename: V
authors.initials: V
authors.lastname: Taufour
authors.forename: J
authors.initials: J
authors.lastname: Flouquet